The latest find from the Yixian formation to challenge the conventional
wisdom, a meter-long carnivore comparable to a honey badger or a Tasmanian
devil. Previously the only evidence that Mesozoic mammals might reach such
sizes were a handful of teeth and other fragmentary remains. A team from
the American Museum of Natural History and IVPP describe the beast in
Nature. They have a virtually complete skeleton of the big guy, preserved
in three dimensions, and a pretty good specimen of a smaller one with
Psittacosaur bones in its belly. My account for New Scientist is on line at